Malicious PDF — malware analysis report

Static analysis result for SHA-256 c601c8dc0d655ff6…

MALICIOUS

PDF

76.5 KB Created: 2021-03-30 15:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5a3319cffc02b51372f4ba62fb1dba4 SHA-1: 6f5634d23d8beef2e1f91c1c61c503bd3630fc43 SHA-256: c601c8dc0d655ff69562689b26c5b70f34a2c2c0b6d6d1142b1485d4c7a8a258
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure related to a book list, but it embeds numerous external links, including one to 'lozipotod.ru', which is likely part of an advance-fee scam. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates this intent. ClamAV also detected this file as a phishing trojan. The presence of embedded JavaScript, though not directly visible in the provided DOC BODY, is a common method for PDF-based malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/award?keyword=1001+books+to+read+before+you+die+list+pdf
    • http://niwizonoleror.mywebcommunity.org/56683346048.pdf
    • http://bestpriceforukraine.xyz/properties_of_a_cuboid_worksheetnovyk.pdf
    • https://static.s123-cdn-static.com/uploads/4369926/normal_5ffa0f693baad.pdf
    • http://odebayitrafikhizmeti.com/rama_judicial_colombia_consulta_procesos_por_cedulatftb9.pdf
    • http://timecodes.net/glencoe_geometry_chapter_4_test_answer_key34gs7.pdf
    • https://cdn-cms.f-static.net/uploads/4384836/normal_60626211330cb.pdf
    • http://loneresel.mygamesonline.org/tai_chi_24_form_tutorial.pdf
    • https://cdn-cms.f-static.net/uploads/4481278/normal_6033b314bdd1c.pdf
    • http://lixorajepidil.mygamesonline.org/basic_exercises.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jitimesolagun/9584488054.pdf
    • http://fiforeru.atwebpages.com/menemopokexojedivenizevos.pdf
    • https://s3.amazonaws.com/tonemakopinibem/akcent_video_songs_hd_free.pdf
    • https://5f90d536-2a72-4461-adff-280afd3056cb.filesusr.com/ugd/27c394_1ba86099406e4fd8a79b8916ada001b2.pdf?index=true
    • https://s3.amazonaws.com/muvojugejoxip/why_is_my_lasko_fan_not_working.pdf
    • https://uploads.strikinglycdn.com/files/fb518404-1ab6-49c7-8bb2-27904886f6ee/72226694137.pdf
    • https://uploads.strikinglycdn.com/files/2fa7b8e5-a18a-47d2-bceb-74aa4e9a8349/guzukas.pdf
    • https://uploads.strikinglycdn.com/files/d06059c8-400f-4e76-a92a-1f347d1b38d3/how_do_i_sync_my_dell_wireless_mouse_with_a_different_receiver.pdf
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_d000b72055454dec8de7710b7f3b800b.pdf?index=true
    • https://s3.amazonaws.com/wewuxuviwar/wizoxilakaruw.pdf
    • https://uploads.strikinglycdn.com/files/9e23f33d-8a3f-46cf-a455-ab27d00b1693/how_much_do_permit_test_cost.pdf
    • https://s3.amazonaws.com/jifedefujodu/puzuxagakikotogodumegatub.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edb6.bin
8959bbcf105a23d465bed732553f00868307f3ee3ba0e0c0f6e4aa7fd8d60291		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB6 5440 bytes
font_01_sfnt_off00010046.bin
a8c3d3b07527de985e3b5e77c1fd47e7d84485f747e1ce40ec040a18bb6db97b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 10620 bytes

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